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A bead and spring model for the stiffness of DNA

✍ Scribed by J. García De La Torre; Juan J. Freire; Arturo Horta

Publisher
Wiley (John Wiley & Sons)
Year
1975
Tongue
English
Weight
443 KB
Volume
14
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

The chain stiffness of linear native DNA is represented by a generalized bead and spring model recently proposed. It incorporates molecular rigidity by means of springs between beads, which are second neighbors along the contour of the chain. These springs are equivalent to elastic forces having longitudinal and transversal contributions. The model is compared with existing experimental data of sedimentation and low‐angle light scattering to obtain the statistical parameters of DNA. The value of the statistical length obtained with this model is 1300 Å. The same value is obtained with the wormlike chain. Throughout this analysis, excluded volume is left out as a simplifying assumption.

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